Threat Level: green Handler on Duty: Johannes Ullrich

SANS ISC: HTTP Header Usage Statistics HTTP Header Usage Statistics


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This is a continuation of work started by Brough Davis as part of his software security project for his Masters in Information Security Engineering. The main goal of this project is to find how many sites use security relevant headers, like for example the X-XSS-Protection or X-Frame-Options headers.

Below you will find a table/histogram showing how many times we found each header (security relevant or not). We access the index page of each site using a "head" request. The list of sites is derived from Alexa's Top 1 Million sites. We try to poll as many sites as possible each day.

As we collect more data, we will plot changes over time.



All Headers Active In The Past Month
Header Popularity
Set-Cookie
Content-Type
Date
Connection
Server
Cache-Control
Vary
X-Frame-Options
Expires
Strict-Transport-Security
Content-Length
X-Content-Type-Options
Link
Accept-CH
Last-Modified
CF-Cache-Status
ETag
Expect-CT
Accept-Ranges
X-XSS-Protection
X-Cache
X-Powered-By
Via
Pragma
CF-RAY
Age
Content-Security-Policy
Alt-Svc
Report-To
NEL
Referrer-Policy
Access-Control-Allow-Origin
X-Amz-Cf-Pop
X-Amz-Cf-Id
Content-Language
X-Cache-Hits
P3P
X-UA-Compatible
X-Served-By
X-Download-Options
X-Xss-Protection
X-Request-Id
X-Timer
CF-Ray
Access-Control-Allow-Headers
Access-Control-Allow-Methods
X-Varnish
X-Adblock-Key
X-Permitted-Cross-Domain-Policies
Access-Control-Allow-Credentials
Content-Security-Policy-Report-Only
Accept-CH-Lifetime
X-DNS-Prefetch-Control
X-AspNet-Version
X-Runtime
Permissions-Policy
X-Drupal-Cache
Server-Timing
X-Envoy-Upstream-Service-Time
X-Generator
X-FRAME-OPTIONS
X-Cache-Status
X-Ua-Compatible
X-Cacheable
X-Iinfo
X-Drupal-Dynamic-Cache
X-CONTENT-TYPE-OPTIONS
Timing-Allow-Origin
Accept-Ch
Feature-Policy
X-XSS-PROTECTION
X-Content-Security-Policy
Xkey
Upgrade
Access-Control-Expose-Headers
X-CDN
Status
Content-Encoding
X-AspNetMvc-Version
Access-Control-Max-Age
X-Amz-Request-Id
X-Amz-Id-2
Host-Header
X-Age
Request-Context
X-Backend
Cf-Edge-Cache
X-Amz-Version-Id
X-Robots-Tag
X-Hacker
Keep-Alive
Cf-Apo-Via
X-Via
X-Turbo-Charged-By
X-Vhost
X-AH-Environment
X-Rq
X-Server
X-Dispatcher
CONTENT-SECURITY-POLICY
X-Cache-Group
X-Proxy-Cache
X-Request-ID
X-Ws-Request-Id
EagleId
X-UA-Device
X-Varnish-Cache
Pantheon-Trace-Id
Grace
X-Pantheon-Styx-Hostname
X-Litespeed-Cache
X-Styx-Req-Id
X-Server-Powered-By
X-Dns-Prefetch-Control
X-WebKit-CSP
X-OneAgent-JS-Injection
X-Pingback
X-Page-Speed
Allow
X-EdgeConnect-MidMile-RTT
X-EdgeConnect-Origin-MEX-Latency
X-Swift-CacheTime
X-Swift-SaveTime
X-Cache-Lookup
Ali-Swift-Global-Savetime
X-Device
X-FTR-Request-ID
X-Node
X-Host
EagleEye-TraceId
X-Backend-Server
X-Server-Id
X-Country-Code
Surrogate-Control
X-Cloud-Trace-Context
X-Ruxit-JS-Agent
Cf-Railgun
X-Readtime
X-Akam-SW-Version
X-HW
P3p
X-Response-Time
Cache-Tag
X-Amz-Server-Side-Encryption
X-LiteSpeed-Cache
Accept-Ch-Lifetime
X-Ua-Device
Content-Location
X-Content-Type
Cross-Origin-Opener-Policy
X-Nginx-Cache-Status
X-Nginx-Upstream-Cache-Status
X-Rack-Cache
Request-Id
Service-Worker-Allowed
X-Trace
X-TraceId
X-Element-Page-Cache
X-Application-Context
X-D2id
Fastly-Restarts
X-Nf-Request-Id
X-Times
X-TtlSet
X-PC
X-Vname
X-Oneagent-Js-Injection
Rating
X-Clacks-Overhead
X-Navigation-Version
X-Cnection
X-Country
X-Midtier
X-Mcache
X-Edge
X-Vcap-Request-Id
X-FTR-Cache-Status
Origin-Trial
X-FTR-Balancer
X-Country-Code-Real
X-FTR-Backend
X-FTR-Backend-Server
X-Browser-Type
Edge-Control
X-FTR-Expires
X-ESI
X-Cache-TTL
X-Url
Surrogate-Key
X-NWS-LOG-UUID
X-FastCGI-Cache
X-Kinja-Build
X-Exp-Id
X-Kinja-Server
X-Kinja-Revision
X-Cdn-Fetch
X-GoogleNews-Bot
X-Kinja
X-Exp-Variant
X-Powered-By-Plesk
X-Abt-Application-Version
X-Ac
X-Upstream
X-Mod-Pagespeed
X-Amz-Rid
Verso
X-ORACLE-DMS-RID
X-ECACHE
X-Language
X-B3-TraceId
Nginx-Cache
Pinterest-Generated-By
Pinterest-Version
X-Pinterest-Rid
X-MS-InvokeApp
X-Request-Device-Id
Akamai-GRN
X-GitHub-Request-Id
Pagespeed
Display
X-Sol
X-Middleton-Display
S
X-Server-Lifecycle-Phase
X-Kraken-Loop-Name
X-Instrumentation
X-Erf-Bev-Bev-Is-Generated
X-Erf-Bev-Bev
X-PDP-UNCACHING-HASH
X-Amzn-Trace-Id
X-Envoy-Decorator-Operation
X-T
AR-Request-ID
AR-ATIME
X-Middleton-Response
Response
AR-PoweredBy
Edge-Cache-Tag
SPIisLatency
SPRequestGuid
SPRequestDuration
X-Meli-Trace-Site
X-Meli-Trace-Bu
X-Meli-Trace-Platform
X-SharePointHealthScore
X-Distributor
X-Goog-Hash
X-Ratelimit-Limit
X-Resp-Is-Stale
X-Ser
X-Ruxit-Js-Agent
X-Kinsta-Cache
X-Edge-Location-Klb
X-ARC
Access-Control-Request-Method
X-NGENIX-Cache
X-Shield-Request-Id
Front-End-Https
X-Dw-Request-Base-Id
X-Request-Processing-Time
X-Request-Received
X-Client-IP
X-Content-Digest
X-Ezoic-Cdn
RTSS
X-Recruiting
X-Cache-Key
Cache-Status
X-Ttl
X-Version
X-Mg-S
X-Varnish-TTL
Ar-SID
X-Amz-Replication-Status
X-Ismobilevalue
YJS-ID
X-Powered-CMS
X-HS-Cache-Config
Public-Key-Pins
TP-Cache
X-HS-Content-Id
X-HS-Hub-Id
Fastcgi-Cache
X-MSEdge-Ref
X-Accel-Expires
X-Correlation-Id
AR-CACHE
Cache-Tags
X-Cached
X-Cluster-Name
X-Newrelic-App-Data
Arr-Disable-Session-Affinity
X-Daa-Tunnel
Realpath
X-Fastly-Request-ID
X-Id
X-RateLimit-Remaining
X-Content-Security-Policy-Report-Only
Content-MD5
X-HS-Combine-CSS
X-Server-Name
X-Azure-Ref
X-Ua-Browser
Payment
X-HP-Webp
X-Cambria-Cache-Control
X-Jurisdiction
X-HP-Trace-Id
X-DIS-Request-ID
X-Kong-Upstream-Latency
X-Kong-Proxy-Latency
X-Forwarded-For
X-Xrds-Location
X-HS-CF-Cache-Status
X-HS-Prerendered
X-GUploader-UploadID
MicrosoftSharePointTeamServices
X-TTL
X-SRCache-Store-Status
X-Amz-Apigw-Id
X-Amzn-RequestId
X-SRCache-Fetch-Status
Content-Disposition
X-Protected-By
X-Px
X-Ratelimit-Reset
Count-Hit
X-Az
X-Activity-Id
X-Unique-Id
X-AppVersion
X-Page-Id
X-Origin-Server
X-Hits
X-Logged-In
X-Rid
X-Git-Hash
Accept-Charset
X-Amz-Meta-S3cmd-Attrs
Cleartype
Cross-Origin-Resource-Policy
X-ORACLE-DMS-ECID
X-FB-Debug
Cross-Origin-Embedder-Policy
X-VARITI-CCR
X-Proxy
X-Request-Handler-Origin-Region
X-Microsite
X-Www-Served-By
Version
X-Load-Cache
X-TEC-API-VERSION
X-TEC-API-ROOT
X-TEC-API-ORIGIN
X-LLID
X-Geo-Country
X-Goog-Metageneration
X-Ratelimit-Remaining
X-Forwarded-Proto
X-Template
X-Varnish-Backend
X-PressLabs-Stats
X-Upgrade-Enabled
X-COUNTRY
Server-Node
X-WebKit-CSP-Report-Only
X-B3-Sampled
Server-Name
X-App-Server
Healthy
X-Hostname
Access-Control-Allow-Method
X-Content-Options
AKAMAI-GRN
X-SERVER-NAME
X-Frontend
X-Requestid
X-Varnish-Grace
Section-Io-Cache
Viewport
X-Device-Type
X-TT
X-ProcessESI
X-RemovedCookies
X-Fb-Rlafr
X-Grace
Fastly-SIE
X-Cache-Age
X-Request-Guid
X-B
Fastly-SWR
Alternate-Protocol
X-Varnish-Server
X-Contextid
Mrf-Cache-Status
X-B3-TraceId-Primal
MRF-Tech
X-Status
X-Goog-Stored-Content-Length
X-Goog-Storage-Class
X-Goog-Generation
X-Hl-Ver
X-Varnish-Ttl
X-Goog-Stored-Content-Encoding
DC
X-CST
TCN
X-CSRF-Token
Upgrade-Insecure-Requests
X-Amzn-Remapped-Content-Length
X-EdgeConnect-Cache-Status
X-Magnolia-Registration
X-Webkit-Csp
X-App-Version
Retry-After
MS-Author-Via
Host
X-Cache-Control
Frame-Options
X-Origin-TTL
X-Yandex-Req-Id
X-Origin-CC
X-Original-Request-Id
X-Revision
X-Response-Served-From
X-Type
Xet-Cookie
X-Oracle-Dms-Ecid
X-Buckets
SD-X-WS
X-Debug
X-Mobile
X-Tt-Trace-Tag
X-ServerID
X-Seen-By
VIX-Pulpo-Node
X-Backend-Name
X-Instance
X-INCAP-ABP
X-Tt-Trace-Host
VIX-Pulpo-Upstream-Status
X-G
X-UUID
X-NYM-Debug-Backend
X-Akamai-Edgescape
X-Adobe-Loc
X-Tumblr-Pixel-0
X-Rendered-As
X-Tumblr-Pixel
X-N
X-Adobe-Content
X-Yottaa-Optimizations
X-Tumblr-User
X-Yottaa-Metrics
Amp-Access-Control-Allow-Source-Origin
X-Cache-Status-Check
X-Is-Bot
Cross-Origin-Embedder-Policy-Report-Only
Cross-Origin-Opener-Policy-Report-Only
X-Lambda-Id
X-Tumblr-Pixel-1
Section-Io-Id
X-Framework
X-Content-Powered-By
X-RTag
X-WP-CF-Super-Cache
Ms-Operation-Id
MS-CV
X-WP-CF-Super-Cache-Cache-Control
X-Mg-Request-UUID
NGB
X-Debug-IsPreview
X-Debug-IsConnected
Access-Control-Request-Headers
X-Trace-Id
X-AB
X-Akamai-Request-ID2
Cache
X-Storage
X-RM-Cache-TTL
X-Server-W
X-Dc
Charset
YJS-CacheStatus
Paypal-Debug-Id
Webserver
Filterid
Selected-Fe
X-Vcl-Version
X-Cacheable-TTL
X-Proxy-Build
X-Timing-Wait
X-ProxyCache-Status
X-ProxyCache-Key
X-DataDome
X-BYPASS-REASON
X-Fastcgi-Cache
Accept-Language
X-Tec-Api-Version
X-VC-Cache
X-Tec-Api-Origin
X-Tec-Api-Root
X-Ms-Request-Id
Onion-Location
X-B3-SpanId
X-Ms-Version
Refresh
X-Cache-Time
X-Cache-Hit
X-User-Agent
SRV
X-F-Cache
X-Time
X-Node-Name
X-VC
X-Region
X-Request-Site
X-Origin-Cache
X-Real-IP
X-Request-Platform
Front
Priority
X-Request-Bu
Apigw-Requestid
Liferay-Portal
GEO-INFO
X-CCDN-Origin-Time
X-CCDN-CacheTTL
X-Hcs-Proxy-Type
X-L-Path
X-Environment-Context
X-Server-ID
X-Mode
X-Service
X-HTML-Minification-Powered-By
X-Mly-Id
CDN-RequestId
X-Rule
X-IPS-LoggedIn
X-LB-Cache
X-Api-Version
X-Drupal-Cache-Tags
X-Tb
X-ECache
X-JoinUs
X-Rocket-Nginx-Serving-Static
X-Origin
X-VCT
X-Rn-Rsrv
X-Rewrite-Enabled
Meta-Geo
Country
Backend
X-UPSTREAM-Address
X-Cache-Expired-At
X-SaId
X-Datadog-Sampling-Priority
X-Adobe-Source
X-Browser-Name
X-Tcp-Rtt
X-Datadog-Trace-Id
X-Is-Tablet
X-Is-Modern-Browser
X-Is-Mobile-Only
X-Is-Mobile
X-Wix-Request-Id
X-Is-Desktop
X-Geo-Region
X-Datadog-Sampled
X-Handled-By
X-Is-Supported-Browser
X-Pass-Why
Cross-Origin-Window-Policy
X-Datadog-Parent-Id
Mn-Server-Ip
X-CLOUD-TRACE-CONTEXT
X-Web-Node
X-Generation-Time
X-Provided-By
X-Optimistic-Header
Webcakes-App-Version
Webcakes-App-Name
X-RateLimit-Remaining-Second
X-RCS-CacheZone
X-Extlb
X-Alternate-Cache-Key
TWC-Locale-Group
X-Routing-Service
Webcakes-Region
X-Vcache
X-Httpd
Web-Mar-Node
TWC-Privacy
TWC-GeoIP-City
TWC-Device-Class
TWC-Connection-Speed
TWC-GeoIP-Country
TWC-GeoIP-DMA
TWC-GeoIP-Region
TWC-GeoIP-LatLong
X-FB-TRIP-ID
Property-Id
Uber-Trace-Id
X-Varnish-Beresp-Grace
Expiry
Fastcgi-Useragent
X-RateLimit-Limit-Second
X-Forwarded-Host
Url
X-WP-CF-Super-Cache-Active
X-Loop
X-Tncms
X-Tt-Logid
X-Proxied
X-Origin-Hint
X-Cdn-Origin
X-Storefront-Renderer-Rendered
ServerID
X-Origin-Date
X-Zipkin-Id
X-Servername
X-Cloudmap
X-Detected-As
X-Connection-Hash
X-Shopify-Stage
X-Whom
X-Proxy-Cache-Info
X-Director
X-Format
ServedBy
X-Cache-Action
X-Hit
OT-Force-Account-Verify
X-Cms-Context
X-Cluster
X-Fetched-On
X-Soup
Atl-Traceid
X-Hosted-By
DB-Nickname
X-Skip-Cache
X-Redis-Cache
X-App-Environment
Countrycode
X-Tumblr-Pixel-2
X-Tumblr-Pixel-3
X-Auth-Group-Type
X-MP-GENERATED-AT
X-Cache-Debug
X-Logging-Id
X-Locale
X-Cluster-Node
X-Endurance-Cache-Level
X-Debug-Info
X-Edge-Location
X-FW-Type
X-Urbn-Site-Id
Protected
AMP-Access-Control-Allow-Source-Origin
X-FW-Dynamic
Cache-Hits
Environment
X-Cache-Host
Locale
X-Urbn-Context-Path
X-Served-From
Node
X-Scope-Id
X-FW-Server
X-FW-Serve
X-FW-Hash
X-FW-Version
X-FW-Static
X-Restarts
X-SayCDN-TTL
X-Say-TTL
X-Say-Cacheable
X-Labrador-Cache-Channel
X-S
X-PHP-Host
X-Drupal-Cache-Contexts
Filters
X-IPLB-Request-ID
X-CDN-Forward
X-HITS
X-Platform
X-IPLB-Instance
LB
X-R9-Blue-Green-Version
X-XRDS-Location
X-B3-Traceid
X-CDN-Cache-Status
Xserver
X-GEO
WPO-Cache-Status
X-No-Session
X-WP-CF-Super-Cache-Cookies-Bypass
X-Sorting-Hat-PodId
X-Varnish-Age
X-ShardId
X-Sorting-Hat-ShopId
X-ShopId
X-NWS-UUID-VERIFY
X-Client-Ip
X-Ua
X-Presslabs-Stats
Request-ID
X-Generated-By
Cache-Tv-Group
X-Varnish-Beresp-Ttl
X-Varnish-Cache-Hits
X-Lagoon
X-Clientip
X-SRCache-Key
X-B-Cache
X-Signature
Expect-Staple
CloudFront-Viewer-Country
Referer-Policy
We-Hiring
Mail-Subject
X-Upstream-Ct
X-UA
X-Upstream-Ht
X-URL
X-Cache-FS-Status
X-Azure-Ref-OriginShield
X-TA-CDN-Provider
X-IsAdmin
X-SRV
X-Cache-Operation
X-Cache-Rule
X-Webstats-RespID
X-PHP-Backend
X-Site-Version
X-NewRelic-App-Data
From-Origin
X-Worker
X-Auto-Login
Location
X-FORWARDED-FOR
X-Bc-Bl
Fl-Custom-Application
X-Server-IP
Cache-Provider
X-Cs
X-Fastly-Request-Id
X-VWS-Id
X-AWS-Id
X-Accel-Version
X-LJ-Flow-ID
X-Ec-Fail
X-Ec-GeoHdr
Sid
X-ND-Cache
X-Org
X-Destination
X-Developer
Xc-Version
X-Tb-Optimization-Total-Bytes-Saved
X-Loc
DCR-Processing-Time-Ms
Origin-Agent-Cluster
S-Rt
X-Ig-Origin-Region
Source
X-GeoCode
Host-ID
X-Aed
DCR-Decision-By
X-External-Request-Id
Candidate-Md5Url
X-Ig-Push-State
N-Cache
X-Application
X-ApacheServer
X-B-Cookie
X-BCube-Filmed-By
X-Bl-Debug
X-A
X-A-Ccd
X-A-Wwc
X-A-Dgt
X-A-Dcw
X-A-Dam
Sslversion
X-Cache-NE
X-D
Ngx.Var.Host
Meta-Geo-Continent
MD5-Digest
Origin
X-Content-Age
Rendered-Blocks
X-Conf
Redirect-Candidate
Pragrma
Lang
X-GeoCountry
WPO-Cache-Message
X-Vtex-Remote-Cache
X-ScT
X-Vdms-Version
X-PERF
X-LSADC-Cache
X-Rojux
X-S-Cookie
X-VC-TTL
X-Xfnlog-Site
X-Litespeed-Cache-Control
X-Epic-Correlation-Id
X-Ee-Request-Id
Country-Code
X-CGP
X-Rocket-Build-Number
X-Eu-Site
X-VG-WebCache
X-Ee-Request-Date
X-Ee-Origin
X-Fastly-Backend
X-Forwarded-Site
CDN-RequestCountryCode
CDN-RequestPullCode
CDN-PullZone
CDN-EdgeStorageId
CDN-Cache
CDN-CachedAt
CDN-RequestPullSuccess
CDN-Uid
Cluster
X-Fmm-Version
X-Ee-Generated-By
X-CacheTTL
Cdncip
Cdnsip
X-FC-Vary-Parameters
X-Varnish-Director
X-Contensis-Viewer-Groups
X-Vary-Devices
X-Section
X-SD-PageType
X-Sigma-Backend
X-Varnish-Hostname
Odigeo-Trace-Id
X-Core-Value
Origin-Site
X-Csrf-Jwt
Powered-By
X-CUA
Log-Origin
X-SIPLIST1
Mime-Version
Gh-Request-Id
X-From
Gannett-Cam-Experience-Id
X-VG-TLSProxy
Ha-Gx-Prefs
X-Save-Cache
L5d-Success-Class
X-Cms-Device
IsBot
X-Depends
Fastly-SSL
Canary
Wxu-Next-Commit
Wxu-Next-Hostname
Wxu-Next-Region
X-Micro-Cache
Web-Mar-Region
X-Varnish-Authentication
X-Varnish-Beresp-Status
X-Slack-Shared-Secret-Outcome
X-Internal-TTL
X-Gamma-Serve
X-Mvc-Supplant-Cachable
X-V-Cache
X-Access
X-Aicache-OS
X-Action
X-PAYTM-SRV-ID
X-AK-Request-ID
X-Origin-Expires
X-Node-Id
X-Old-Content-Length
X-Policy
Time-Cloud-Cache
X-Sn-Servicetimems
X-GeoIP-Country-Code
X-GeoIP-City
Apple-News-Services-Request-Url
Apple-News-Services-Parsed-Url
Apple-News-Services-Handled
X-Tx-Id
X-Req
X-Sigma
RNT-Machine
RNT-Time
X-Slack-Backend
ServerName
X-GeoIP-Region-Code
Apple-News-Services-Host
X-GoCache-CacheStatus
X-HS-Content-Campaign-Id
X-Cache-Aspx
X-Bug-Bounty
X-Hash
Store-Cloud-Cache
X-Parent-Response-Time
X-Cache-Date
X-Akamai-Device-Characteristics
X-Block-Status
X-Amz-Storage-Class
X-Bip
X-BBC-Edge-Cache-Status
X-SVT-ORM-VERSION
X-Thinkindot-L3
X-Thanos
X-Sucuri-Cache
X-SVT-ORM-RULES
X-UA-Device-Type
X-Backend-Instance
X-Uri
X-Request-URI
X-Jungle-Id
X-Vmg-Version
X-DefHash
X-DefElseHash
X-Level-Front-Cache
X-Ion-Hop
X-Dispatcher-Server
X-Up
X-NMSegId
X-Men
X-Ion-Healthy
X-Proto
X-Mvc-Supplant-OutputCached
X-Wikidot-Static-Cache
X-Origin-Time
X-Wikidot-Backend
X-Path
NM-Fastcgi-Cache
Server-Host
X-We-Are-Hiring
X-Nyt-Route
X-Op-Id-All
Vix-Hermes-Req-Id
X-Varnish-CookieHashed-On
X-Viewer-Country
X-Debug-Cache-Store
X-Ec-Custom-Error
X-Reqid
X-Frame-Option
X-SB
X-Debug-Cache-Fetch
X-VarnishDD-TTL
X-Shield-Cache-Expires
X-Date
X-Varnish-Remaining-TTL
X-Via-Fastly
X-Gdpr
X-Render-Time
X-Varnish-CookieINHashed-On
X-Region-Sid
X-Pubstack
X-Human
X-Hnp-Log
X-Gen-Mode
X-Generated-On
X-Thinkindot-L1
X-HN
X-Content-Length
X-App-Name
Origin-CC
Nord-Request-ID
Machine
L
Origin-EX
PFcat
Cmstype
Req-Svc-Chain
Release
Pics-Label
Azure-InstanceId
Azure-RegionName
DSUID
Cmsid
Content-Style-Type
Content-Script-Type
CDCHOST
Fastly-Backend-Name
Azure-SiteName
Azure-SlotName
Azure-Version
Cache-Contol
RewriteTestHook
RewriteTeamHook
Load-Balancing
Thinkindot-CacheControl
X-Acquia-Purge-Cdn-Unconfigured
V-Age
User-Cache-Control
TDXMobile
Thinkindot-CacheControl-Type
AR-SID
X-Accel-Expires-Debug
X-AB-Test
CF-IPCountry
X-Cached-By
X-CACHE-AGE
X-ZONE
X-NGINX-Cache
Click-Count-Error
Click-Count-Action-Start
X-Vercel-Id
X-Proxied-Request
X-Vercel-Cache
X-Edge-Server
X-Esi-Check
Cdn-Request-Time
X-DPWN-IS-SECURE
X-Cache-Id
Platform
Cdn-Host
CacheControlHeader
Producers
X-Moov-Xdn-Caching-Status
X-Moov-T
X-Gzip
X-Location
X-Moov-Xdn-Version
C-Via
Tube-Get-Contents
Tube-Got-Eval
Tube-Got-Results
X-B3-Trace-ID
Fastly-GeoIP-CountryCode
Tube-Return
X-ElasticPress-Query
X-Pad
X-NF-Request-ID
X-Sucuri-ID
X-Origin-Response-Time
XM
Cookie
X-Nginx-Cache-Key
X-Debug-Service
X-Via-Popn
X-Varnish-Hits
X-Via-Poph
X-Datadome
NGX
X-Via-Popv
Fastly-Drupal-HTML
True-Client-Country-4JS
X-Air-Pt
X-Srv
Sever-Int
X-AIR-PT
X-Refresh
Debug
X-HA-Backend
Server-Ext
Server-Hostname
X-Webkit-CSP
X-Wormhole-Sdk
Show-Do-Not-Sell-Link
X-APP
Traceparent
X-Cache-Backend
X-Ez-Minify-Html
X-Servedbyhost
GeoIp-Country-Code
GeoIP-Latitude
X-TH-Server
X-DynaTrace-JS-Agent
X-LB-ID
X-Nananana
Server-ID
Product
WZWS-RAY
DataCenter
X-Unity-Cache
HA-Ipaddr
HostName
Fastly-Drupal-Html
X-Zone
Cdn
X-Fpc
X-Source
X-Amz-Meta-Cb-Modifiedtime
X-B3-Parentspanid
X-Litespeed-Tag
Tcn
X-Newrelic-Synthetics
X-Cache-VC
X-GeoIP
X-Nc
X-Wa
X-VCL-Version
X-Cdn-Forward
X-User
X-AC
Edge-Cache
Lb
X-CDN-Provider
X-B3-Spanid
X-Nginx-Cache
SID
A
Serverhost
X-Proxy-Cache-La3
X-Vc
X-Proxy-CacheR9
Xkeylog
XkeyR9
Xkey-La3
X-TX-ID
X-TT-LOGID
Resin-Trace
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X-Datacenter
Cs
X-LB-NoCache
X-RateLimit-Limit
X-Request-Start
Akamai-Mon-Iucid-Del
NtCoent-Length
MIME-Version
Yjs-Id
Cdn-Requestid
CDN
X-LiteSpeed-Tag
X-Service-Response-Time
Wsr-Cache
X-WA
Sm-Log-Id
X-Lsadc-Cache
Esi-Enabled
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X-LiteSpeed-Cache-Control
X-FPC
X-Dynatrace-Js-Agent
X-Udemy-Cache-App-Namespace
X-HubSpot-Correlation-Id
X-NC
X-Aspnet-Version
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X-TIM-N
X-Lb-Id
X-Styx-Origin-Id
X-HA-Application-Name
Hostname
Uri
X-Styx-Info
Content-Secure-Policy
X-Request-Host
X-Pool
Datacenter
Cr
Proxy-Firewall
Server-Id
Pramga
X-Html-Minification-Powered-By
X-Akamai-Pragma-Client-IP
RATING
X-Var-Ttl
Surrogated-Key
X-NodeID
ServerHost
X-TimeS
X-Fastly-Backend-Reqs
Geoip-Latitude
X-Srcache-Store-Status
X-Srcache-Fetch-Status
X-Stale
X-Via-JSL
X-Ez-Minify-Js
GeoIP-Country-Code
X-RequestId
X-CS
X-Cache-Grace
From-Cache
T-Server
W
X-ServedByHost
X-Lb-Nocache
X-Varnish-Beresp-TTL
X-Vgn-Hpd-Reason
Srv
X-Aspnetmvc-Version
X-Wp-Cf-Super-Cache-Cache-Control
X-Oracle-DMS-ECID
X-Wp-Cf-Super-Cache
X-MSEdge-Features
X-MSEdge-Flight
X-DataCenter
X-Swift-Error
X-App
Expect-Ct
Yak-Timeinfo
X-NODE
X-DynaTrace
Cloudfront-Viewer-Country
X-CACHE-KEY
X-Air-Hostname
X-Sorting-Hat-Podid
X-Shopid
X-Shardid
X-LAGOON
X-Wp-Cf-Super-Cache-Cookies-Bypass
X-Sorting-Hat-Shopid
X-Air-Source
X-Air-Trace-Id
X-Wp-Cf-Super-Cache-Active
X-Via-CDN
X-ByteArk-ReqID
Ohc-Cache-HIT
X-ByteArk-Cache
X-Via-SSL
X-Via-Edge
X-Key
X-Ha-Backend
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X-Ssense-Gql
Ohc-File-Size
X-Proxy-Cache-LA2
X-Correlation-ID
X-Ssense-Shipping-Surcharge-Enabled
X-Ramcache
X-VServer
X-Via-PopH
X-Elasticpress-Query
X-Geolocation
Ngx
X-Via-PopN
X-Geo
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X-Jobs
X-Zen-Fury
CF-Cached-On
X-Via-PopV
N1-Cache
X-Cdn-Cache-Status
Cl-Cache
X-Web-Server
X-Webkit-Csp-Report-Only
X-CSRF-TOKEN
WP-Super-Cache
WebServer
X-Check-Cacheable
FSS-Cache
X-PageType
True-Client-IP
X-Sucuri-Id
X-ATG-Version
X-DC
Akamai-X-True-TTL
X-Th-Server
X-Iplb-Request-Id
X-Iplb-Instance
Cf-Ipcountry
My-App
Warning
X-Limited
X-MiniProfiler-Ids
X-Serial
X-Beacon
X-Mg-Cache
X-Env
X-Fastly-Cache-Status
X-Request-Url
Host-Name
Xkey-G-Jp
On-Server
X-Cdn-Srv
User-Agent